I just did this last weekend. Go to hardware store and buy a 4" PVC "T" and a 4" toilet base. Remove spreader, widen hole on feeder to 4". Screw toilet base to bottom of feeder. Glue "T" to toilet base. DONE! Side note - I open the whole to 4" because i use "dirty" beans for feed and the trash tends to clog up the smaller hole on the feeder. If your feedeing clean corn you don't have to widen the hole.